Pascal Bruckner claimed Europeans are "no longer traumatised" by terror atrocities because they are so used to them.

The left-leaning philosopher's comments come just days after the harrowing Manchester Arena bombing in which 22 people lost their lives after terrorist Salman Abedi blew himself up.

Mr Bruckner told Le Figaro: “We are no longer traumatised by such events. Horror has become routine. We forget too fast: the truck attack in Nice… the police officer shot on the Champs Elysées in April.

Horror has become routine.

Pascal Bruckner

"We’ve erased these attacks from our memories. Either people have become indifferent to terrorism, or they have become more resilient. Life goes on, and we are no longer intimidated by bombs. This combination of nonchalance and self-control is a sign of maturity."

Mr Bruckner went on to say Islam must be reformed to tackle the "root" of the problem.

He said: “The word ‘terrorism’ is the politically correct term we use to avoid discussing the root cause of the problem: that terrorism is the radical and literal interpretation or the misinterpretation of Islam. We cannot combat terrorism through force alone. Muslims must work on reforming their religion.”

The philosopher also said just because the Islamic State is on the brink of defeat, it does not mean the West has won the war on terror.

He said: “People who think that terrorism is the fruit of ISIS are naïve. ISIS will be crushed, but another terrorist organisation will take its place. Al-Qaeda is doing well and is no better than ISIS.

"We will never be able to eradicate extremism if all we do is send armed forces to combat terrorist groups on the ground. We must prevent extremism through religious education.”

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But promoting multiculturalism and religious tolerance does not shield a country from terrorism, Mr Bruckner added.

He said: “British-style multiculturalism has failed. The British have been so tolerant of Sharia Law that the country is now teeming with Salafists.

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A suicide bomber targeted children at Ariana Grande's concert in Manchester

"But there is no right or wrong when it comes to integrating Muslims into Western societies. Because no social model can combat terrorism.”

Mr Bruckner added that there would be “more terrorist attacks” on European soil and that countries on ISIS’ hit list, including France and Britain, and that they have to put all their energy into “fighting the enemy”.